Variational approach to a class of nonlinear oscillators with several limit cycles

Details Variational approach to a class of nonlinear oscillators with several limit cycles Variational approach to a class of nonlinear oscillators with several limit cycles

2001-03-22

arxiv.org/abs/nlin/0103034v1

Phys. Rev. E 64, 056217 (2001)

Nonlinear Sciences

Chaotic Dynamics

12 pages, 3 figures

Scientific paper

10.1103/PhysRevE.64.056217

We study limit cycles of nonlinear oscillators described by the equation $\ddot x + \nu F(\dot x) + x =0$. Depending on the nonlinearity this equation may exhibit different number of limit cycles. We show that limit cycles correspond to relative extrema of a certain functional. Analytical results in the limits $\nu ->0$ and $\nu -> \infty$ are in agreement with previously known criteria. For intermediate $\nu$ numerical determination of the limit cycles can be obtained.

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